1 Table of Contents: “..., Labour Share in Total Costs -- 5.4 Raw Materials Requirements -- 5.5 Transport Costs -- 5.6 By-products...”

2 “... importance to a degree which is not shared with the commoner varieties of igneous rocks. Kimberlites...”

3 “... scientists and ceramicists who normally had little contact but shared common interests in deformation...”

4 “... who share an interest in the properties of fine-grained minerals in sediments. During the last several...”

5 “.... It is indeed a privilege for us to have the opportunity of sharing with these two eminent scientists the wealth...”